linux-kernel - [PATCH] i2c: mux: demux-pinctrl: Handle error for devm

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Message-Id: <20220302080342.71803-1-jiasheng@iscas.ac.cn>
Date:   Wed,  2 Mar 2022 16:03:42 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     wsa+renesas@...g-engineering.com, peda@...ntia.se
Cc:     linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] i2c: mux: demux-pinctrl: Handle error for devm_kstrdup

As the potential failure of the devm_kstrdup(),
it should be better to check it and return error
if fails.

Fixes: e35478eac030 ("i2c: mux: demux-pinctrl: run properly with multiple instances")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/i2c/muxes/i2c-demux-pinctrl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/i2c/muxes/i2c-demux-pinctrl.c b/drivers/i2c/muxes/i2c-demux-pinctrl.c
index 5365199a31f4..3203361b00f2 100644
--- a/drivers/i2c/muxes/i2c-demux-pinctrl.c
+++ b/drivers/i2c/muxes/i2c-demux-pinctrl.c
@@ -243,6 +243,10 @@ static int i2c_demux_pinctrl_probe(struct platform_device *pdev)
 
 		props[i].name = devm_kstrdup(&pdev->dev, "status", GFP_KERNEL);
 		props[i].value = devm_kstrdup(&pdev->dev, "ok", GFP_KERNEL);
+		if (!props[i].name || !props[i].value) {
+			err = -ENOMEM;
+			goto err_rollback;
+		}
 		props[i].length = 3;
 
 		of_changeset_init(&priv->chan[i].chgset);
-- 
2.25.1